ART
BEAUTY & WELLNESS
CRAFT
CULTURE & HISTORY
ENTERTAINMENT
ENVIRONMENT
FOOD & DRINKS
REVERSE ENGINEERING
SCIENCES
SPORTS
TECHNOLOGY
WEARABLES
Hydrogen Peroxide 10 %: the 3 % Solution Evaporated in Air at 75 °C, Checked with Permanganate (Thorpe 1912)
Water evaporates faster than hydrogen peroxide, so warming a weak solution in open air makes it stronger. Thorpe gives 75 °C for this first stage; we stop at 10 %, checking the strength with permanganate.
Result: hydrogen peroxide of about 10 %.
Source: Thorpe, Dictionary of Applied Chemistry, vol. 3 (1912), Hydrogen peroxide. Thorpe takes it on to 20 %; stopping at 10 % is ours. Danger: 10 % peroxide burns skin and eyes. Picture drawn by Youblob.
Intermediate
1 day
Instructions
1
1
Evaporate the 3 % solution in air at 75 °C
Evaporate the 3 % solution in air at 75 °C
Warm 3 % hydrogen peroxide in an open dish at 75 °C so the water evaporates. Thorpe goes on to 20 %; ours: stop near 10 %, about a third of the starting volume. Wear goggles and gloves.
Materials for this step:
Hydrogen Peroxide (3%)1 as requiredTools needed:
Evaporating Dish
Water Bath
Thermometer - Lab
Chemical Splash Goggles
Rubber Gloves2
2
Check the strength with permanganate
Check the strength with permanganate
Titrate 2 c.c. in a 35 c.c. graduated tube with 5-6 drops of hydrochloric acid and a solution of 7.9 g potassium permanganate per litre until it turns red or brownish; 5 c.c. means 1 %. Ours for 10 %: dilute 1 c.c. to 2 c.c. first, so 25 c.c. means 10 %.
Tools needed:
Potassium Permanganate - KMnO₄
Hydrochloric Acid
Distilled Water
Burette (Glass)
Graduated Pipette (Mohr)3
3
Store it cool and dark
Store it cool and dark
Ours: keep the 10 % solution in a cool, dark bottle; it slowly loses strength.
Tools needed:
Amber Glass BottleMaterials
1- 1 as requiredPlaceholder
Tools Required
11- Placeholder
- Placeholder
- Placeholder
- Placeholder
- Placeholder
- Placeholder
- Placeholder
- Placeholder
- Placeholder
- Placeholder
- Placeholder
This blueprint makes
Related Blueprints
These blueprints share knowledge with this one — techniques, materials, or principles that connect them in the learning graph.
CC0 Public Domain
This blueprint is released under CC0. You are free to copy, modify, distribute, and use this work for any purpose, without asking permission.
Support the Maker by purchasing products through their Blueprint where they earn a Maker Commission set by Vendors, or create a new iteration of this Blueprint and include it as a connection in your own Blueprint to share revenue.